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Positions of the vocative 

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Several positions are available for the vocative. It may occupy the whole speaker

turn. It may occur at the beginning of a speaker’s turn (front position) or in the

course of the turn (mid position), or at the end (end position). End position is by

far the most frequent. Mid-position vocatives are not so frequent and are normally

preceded by some sort of discourse marker prefacing the main utterance:

Tell me

, 

Margaret. Er, you more or less got where you are today more or less off

your own bat.

[North West Tonight is the name of a TV news programme; Old Trafford is a

sports ground]

Just, just on that

, 

Lilian. It may have occurred to you already, but North West

Tonight are doing some filming at Old Trafford.